The City is testing slag, a by-product created during steel production in Pueblo, because it is an extremely hard aggregate made from 100-percent recycled material. Slag is a reasonably priced alternative to traditional rock that also has the potential benefit of a longer life-cycle due to increased durability.

Combined with TBTRA, which uses recycled tires blended into the asphalt oil, the test section on Voyager Parkway uses 96 percent recycled components overall. Since 2005, the City of Colorado Springs? award-winning TBTRA program has used a total of 226 tons of liquid tire rubber from approximately 45,500 waste tires in its various paving programs.

The test sections, which also include a traditional granite comparison section, extend along Voyager Parkway from the south side of the Ridgeline Drive intersection (extending south 1,000 feet) and from the north side of the Jet Stream Drive intersection (extending north 890 feet).